In which of the following processes will energy be evolved as heat? Melting subl
ID: 1011094 • Letter: I
Question
In which of the following processes will energy be evolved as heat? Melting sublimation crystallization vaporization none of these The vapor pressure of a given liquid will increase if the volume of the vapor phase is increased. A more volatile liquid is added to the given liquid. the temperature is increased. the volume of the liquid is increased. the liquid is moved to a container in which its surface is very much larger. From a consideration of the phase diagram below, a change from point M to point N corresponds to condensation. freezing. liquefaction. evaporation. sublimation. Below is a phase diagram for a substance. Which line represents the melting-point curve of the substance? S-Z X-Z M-N R-X S-X Which substance involves no bonding forces except London dispersion forces? K(s) NaCl(l) HF(l) N_2(l) H_2O(l) Which one of the following decreases as the strength of the attractive intermolecular forces increases? The normal boiling temperature. The sublimation temperature of a solid. The vapor pressure of a liquid. The extent of deviations from the ideal gas law. The heat of vaporization. Which of the following compounds has the highest normal boiling point? CH_3CH_2CH_2CH_3 CH_3Cl CH_3CH_2CH_3 CH_3CH_2OH CH_3OCH_3Explanation / Answer
25)
energy is released when crystallisation occur
All other processes in option absorbs heat
Answer: C
i am allowed to answer only 1 question at a time
27)
It is changing from liquid to solid. It is freezing
Answer: B
28)
melting occur from N to O which will cross RX line
Answer: D
29)
K has only london forces
Answer: A